Tig add on ?

Based on a recommendation from Ernie Leimkuhler, I purchased an add-on from the Tig Depot , about 1½ years ago. Works fine for what I need, works good on aluminum.
Advantages: low initial cost, easy hookup. You will need to buy a high frequency add-on to get much use out of it, based on my experience.
Disadvantages: No current control while welding, none of the bells and whistles you'd enjoy with the $1500-3000 units.
If your use will be mainly thin metal, I don't see how you can go wrong. Sure, I'd love to step up to a bigger unit, but I simply can't justify it at this time.
del my '34 Ford Project: